Motor-compressor.



W. H. LIEBER. MOTOR COMPRESSOR. APPLICATION FILED Nov. 19, 1908.

Patented June 7, 1910.

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961,085. Patented June 7, 1910.

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- ATTRNEY W. H. LIEBER. MOTOR GUMPRESSOR. APPLIGATION FILED Nov. 19, 190e.

Patented June 7, 1910.

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Z ATTUPNEY- W. H. LIEBER. MOTOR COMPRESSOR. APPLICATION PILPD Nov. 19, 190s.

Patented June 7,1910,

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UNITED sTATEsT PATENT oEEicE.

WILLIAM H. LIEBER, 0F MILWAUKEE. WISCONSIN, ASSIGNOR TO ALLIS-CHALMERS COMPANY, OF MILWAUKEE, WISCONSIN,'A CORPORATION OF NEW JERSEY.

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961,085. Specification of Letters Patent.

. Patented June 7, 1910.

Application filed November 19, 1908. Serial No. 463,401.

To all whomt't mtl/y concern: crank chamber l to gear case 2. Bearing 7 Be it known that I, WILLIAM H. LIEBER, i has a similar passage 10 thereunder, allowa citizen of theUnited States, residing at ,'ing oil 5 to pass therethrough and through Milwaukee, in the county of Milwaukee Aand the opening 21 while filling chamber 1 in the State of Wisconsin, have invented a certain i casing. The crankshaft 6 has keyed thereon new and useful Motor-Compressor, of which at one end a gear ll'which extends into gear the following is a specilication.' casing 2. The gear ll'extends above the n l This invention relates to various improvei top of theV crank case 1 and gear case 2. ments in the construction ofmotor driven The crank shaft 6 is held into the bearings compressors, and particularly applies to that 7 and 8 by means O'f the bearing Caps 14 and class in which the motor is mounted above 15. These caps-14 and 15 are provided with the compressor casing. oil basins through the bottoms of which oil The ob]ect of the invention is to produce holes 17 are drilled. These oil holes 17 proa motor compressor which 1s simple in its vide the bearings 7 and 8 with the necessary construction as well as being efficient in its oil for lubrication. operation.

The cranks 18 and 19 of crank shaft 6 are In order to insure satlsfactory operationI located directly vin front of and in line with of compressors :of this type, all of the workthe open cylinders 3 and 4, see Fig. 2. Coning parts must be well lubricated.

A divisional application Serial Number 493,635 has been led May 3, 1909, coverin the stem of lubrication herein disclose Asiiirther feature is to provide a machine in which the parts are quickly and easily assembled and disassembled and cheaply machined.

A clear conception of the inventionis obtained by referring to the drawings accompanying this specification, in which like reference characters designate the same part to wrist pins in the pistons which reciprocate in the cylinders 3 and 4. The connecting rods, wrist ins and pistons are not shown because tieir construction is well known in the art. See Christensen 635,280, Oct. 17, i899.

The combined crank and gea-r' ease and cylinders are furthermore provided with lugs or feet 20 by means of which the compressor may be fastened to a support. A The gear case 2 is provided with an opening 22 as its lower extremity through which the oil 5 may be drawn oft'.

The pump base is provided with a cover 23 whichextends only as far'as the gear case 2, see Figs. 2 and 3, and has an opening .24 therein. This opening A24 serves as a vent and opens direct y from tliecrank ca -sev 1 to the atmosphere. The opening 24 is preferably placed between the two cranks 18 and 19 and may have the shields 25 to keep any oil from splashing-out duc to the revolution of shaft 6.

The'motor having the armature4 sliaf t\13 is mounted upon plate 23 with as much air space 28 between the motor base 27 and the cover plate23 as can be allowed for a minimum over all height of machine. This air space 28 is to prevent any heat due to compression in cylinders 3 'and 4 -frompassing to the motor '26. f

Figure 1 is a. front elevation of the device. Fig. 2 is a central'vertical section on the line 2 2 of Fig. 3f Fig. 3 is a plan. Fig. 4 is an end elevation looking in the direction of the arrow A, while Fig. 5 is a fragmentary eleva-tion, and Fig. 6 is a vertical section of the cylinder head taken on line 6-6 of Fig. 3.

As shown in Figs. 1, 2 and 4, the crank case 1, the gear case 2, and the cylinders 3 and 4 are cast in one piece. The crank case 1 and gear case 2 are cast with round bottoms, as shown in Fig. 4, in order to produce a stronger casting and give the connecting rods a better swee through the'oil 5 contained therein. T e crank shaft 6 is supported by the bearings 7 and 8 in the crank case 1, and lies at right angles to the. cylinders 3 and 4. The bearing 8 has an opening 9v thereunder, allowing oil 5 to pass from ne'cting rods extend from cranks 18 and 19" The motor vbase 27 contains the two bear-A ings 29 and 30 which support the armature shaft 13. These bearings 29 and 30 contain oil pockets 31 and 32 in which can revolve the oil rings 33 and 34 supported by the armature shaft 13. There is an opening 35 in bearing pocket 32, and an overflow pipe 3o which connects with said pocket at a point at the level of the opening 35, see Figs. 1 and 4. `'lhis pi pe 3G runs along the side of crank case 1 and enters bearing pocket 31 at a slightly lower level than it emerges froin bearing pocket 32. Oil pocket 31 is provided with an overfiow 37 which is so located that it will precipitate any overflowing oil into bearing cap 14 over bearing 7 of the crank shaft f3 within the crank case 1.

The bearing 2f) at the eonnnutator end of the armature shaft 13 is provided With a.

' bearing cap 38 to which the brush yoke 39 is attached. See Fig. 2. The brushes` are of ordinary construction and are not shown. A casting 41 forms a cap .forthe bearing 30 at the gear end of the armature shaft 13 and also forms a cover for the upper end of the gear case 2. r1`his casting 41 is fastened directly to the gear case 2 and also to the bearing 30 of the motor base 27 by means of zap screws 40 and abuts the end of plate 23 in vertical plane 44. See Figs. 1, 3 and 4. The parting is along two horizontal planes 42 and 43 and one vertical plane 44. Figs. 1 and 2.

The Inotor base 27 comprises in one casting the bearings 29, 30, see Fig. 2, and the polepiece 45, see Fig. 4. The remaining polepiece 4G is cast in one piece with the field frame 47. The field frame 47 and motor base 27 part along the planes 51, 48, 58 and 4S), see Figs. 1 and 4, and are connected to each other by the cap screws The armature is thus housed in at the gear end by an end wall, the upper half of which is an extension of the field frame 47, while the lower half is an extension of the motor base 27. The other end of the armature, the connnutator and the bearing 2t) ari housed in by a cover which joins the other parts ot' theinachine along the planes 59, 49, 51, 50 and 43, see Figs. 1 and 2. 1t will thus be seen that the upper edge of the extension 27() on the motor base 27 and the l'pper edge of the niotor base 27 itself, coact with the field frame 47 of the inotor and with the cover in a single-plane 51. 'lhis cover 75 is fastened to the machine at.

case 1 by pivoted clamping bolts (S0. The

cover is therefore easily removed byloosening and swinging back clamp bolts and lifting the cover 55'bodily oft' the doWel pins lIt should vbe noted that the cover 55 coacts lalong the major portion of its side edges Withtwofwalls 270, 470, oneof which v See 270, is anY extension and forms a part of the motor' base 27, while the other 470, is anv extension and forms a part of the field frame 47 and joins with the inotor base 27 along the plane 4t). ,See dotted line Fig. 1. The armature 5G is also provided with two oil throwcrs 62 and (53 which prevent any oil from entering the coils.

The cylinder heads shown in Figs. 5 and 6 are cast in one piece (S4 and extend over the cylinders 3 and 4 and are fastened thereto by spaced bolts. The casings for the suction valves 65, and likewise the casings for the discharge valves (36, are fornied in the cylinder heads. The passages 71, 73 leading to and from these casings are also formed directly in the casting (S4. These valves (S5 and (3(1 are of the type known as gravity valves and are limited in their'downward travel by valve seats (57, and in their upward travel by caps (58. There is a single suction opening (59 leading to the cylinder heads, and a single discharge opening 7() leading from the heads. The suction opening (3S) leads from the outer side of the cylinder heads into a passage 71 leading to the two suction valves (55 from directly underneath theni and in line with their motion and connecting with the ports 74 leading directly into the cylinders 3 and 4, the suction opening being at a point in the conduit inidwa)Y between said suction ports. The passage 71 passes between certain of the cylinder head bolts, so as to be free from interference therewith. Such construction of extending the suction opening (39 into the conduit 71 from the outer side of the cylinder head permits of easy attachment of the necessary suction piping. The location of the suction opening at a point in the conduit inidway between the suction ports affords an additional means during casting of the heads of anchoring the core for the conduit 71. This luid-location also serves to equalize the suction for the two cylinders for during operation only half the conduit full of air has to be started into motion at the bei ginning of each suction stroke. The discharge opening leads froin a passage 73 leading from the two discharge valves (36 and connecting with the ports 75 leading directly from the cylinders 3 and 4.

During the operation of the motor conipressor, the gear 11 revolving in gear case serves as a pulnp and carries considerable oil' to pinion l2. which oil as it. strikes the pinion 12l is deflected endwisc. therefrlon'i, part of it passing through opening 35 into pocket 32. The oil overfiows from pocket 32 4through the pipe 36 to pocket 31 in the bearing 29, from which it passes through the overflow 37 to bea-ring 7. After leaving bearing 7 it passes back to crank case 1 and mingles with oil 5 therein. vThe lubrication cover plate havinga port including a gear case, a motor over sai canoes of the piston, wrist pin and connecting rod is ettected by the connecting rod which sweeps through oil 5 and throws it back against the Wrist pin'. Sufficient oil runs back from gear 11 onto bearing S to lubricate it. Thus an automatic oiling of every part is established and the machine needs no manual oiling when once assembled.

By making the rear bearing cap and gear case coverin one casting 41, the upper section of the gear 11, the pinion 12 and the rear bearing 30 are exposed by the removal of one piece. Since the field frame 47 and motor base 27 are made of cast steel, the use of an unnecessary amount of cast steel is avoided by making the gear case cover 41 a separate casting. Y

lt should be understood that it is not desired to be limited to the exact details of construction shown and described, for obvious modications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,-

l. In a motor compressor, the combination of a crank case and a gear case together forming a pump base, a-motor overthe crank fase, .bearings for the motor rotor, a cap and gear case cover coacting with one of said bearings and with said gear case and a second cover coactingwith the motor and crank case.

2. In a motor compressor, the'combination of a crank case, a motor over the crank case, and a cover plate spaced from the motor and between said motor and the crankcase, said therethrough into said space for venting said crank case.

3. In a motor compressor, the combination of a crank case and a gear case together forming a pump base, a cover plate on the crank case, a motor on the cover plate, a gear case cover and a second cover coacting with said pump base for Ainclosing working parts.

4. In a motor compressor, a motor, an extension on the motor ield frame, a second extension on the `motor base, and a cover, all coacting to form a casing for the commutator end of the motor.

5. In a` motor compressor, a crank case and a gear case -together forming a pump base, a motor mounted over said crank case, aA crank shaft within said crank case, saidmotor being geared with said crank shaft, a bearing for said motor said bearing lying over said crank case, and a gear case cover over said gear case said cover extending upwardly from a level at leastas low as the ottoni of said motor and said cover being separate from said bearing and having an extension over said bearing forming a cap therefor. 6. In a motor compressor, a pump controlling said ports,

base

pump base, bearings for said motor formed in one piece with the motor frame, a gear case cover and a second cover each coacting with the pump base and with the motor and 'each cover separately and alone detachable from the pump base and motor.

7. In a motor compressor,Av a crank case' anda gear case together forming a pump base, a motor mounted over said crank case, a crank shaft within said crank case, said motor being gearedwith said crank shaft, cover elements comprising a cover plate between the motor and the crank case, a gear case cover, and a second cover, all three of said cover elements coacting with the crank case in a single plane.

a pump base, a

8. In a motor compressor, motor over said pump base, a bearing at the commutator end of said motor formed in one piece with the motor frame, and a plurality of covers each coacting lwith an upper surface of said pump base and of said motor, for inclosingworking parts including said commutator. i

9.111 a motor compressor, a crank case and a gear case together forming a pump base, a motor mounted over said crank case, a crankshaft within saidcrank case, said motor being geared with said crank shaft, and an extension on the field frame for inclosing Working the extension and frame coacting with the motor single plane. A

10. In a motor compressor, a crank ase and a gear case together forming a pump base, a motor mounted over said crank case, al crank shaft within said crank case, said motor being geared with said crank shaft, a cover, and an extension on for inclosing workin@ parts, the u per `edge of said extension an the upper e e of the motor base 'coacting with the ield tlrame of said motor and with the cover in a' single plane.

11. In a motor compressor, a plurality of horizontal cylinders, a head common to said cylinders, bolts for fastening said head to base in a said cylinders, separatev suction 'and' dis' charge ports formed in Said'head for each of said cylinders, valves in said head for and a conduit. formed in said head connecting and directed to said suction ports in line with the. motion of said suction valves at points near said ports, said conduit being gradually curve'd from one of said suction valves to suction valves and assing between said bolts to be free from interference therewith and said head having formed therein from its outer side an atmos heric -suction opening leading to said con uit at a point midway between said suction ports.

12. In a motor compressor, a pump base,

parts, the lower edge of the lower edge of the field the motor base another of said a motor over said pump base, and a pluface of'said pump base and a end sur-face ralty of covers, each coactng with said of said mtor. l0 pump base in a single plane and with said In testimony whereof, I ax my signature motor, for nclosng Working parts. in the pmseuce of two Witnesses.

13. In a motor compressor, a pump base, W'ILLIAM H. LIEBER. a motor over said pump base, a cover plate Witnesses: between said motor und said pump base, and G. F. DE WEIN,

:l second cover enacting with an upper Sur- H. C. CASE. 

